How to update a UI label from a non UI thread in iOS

Question

I am new to iOS development, I have plain objective -c class \"MoneyTimer.m\" for running timer, from there i want to update the an UI label with the changing value of timer.

Answer 1

I've done something identical in the past.

I used a function to set the label text:

- (void)updateLabelText:(NSString *)newText {
    yourLabel.text = newText;
}

and then called this function on the main thread with performSelectorOnMainThread

NSString* myText = @"new value";
[self performSelectorOnMainThread:(@selector)updateLabelText withObject:myText waitUntilDone:NO];